Hello, world!

javascript/snake.js

@@ -1,99 +1 @@
-const http = require('http');
-
-const requestHandler = (req, res) => {
-    if (req.url === '/') {
-        handleGetMetaData(req, res);
-    } else if (req.url === '/start') {
-        handleWithBody(req, res, handleGameStart);
-    } else if (req.url === '/move') {
-        handleWithBody(req, res, handleMove);
-    }
-}
-
-const handleGetMetaData = (req, res) => {
-    const response = {
-        'apiversion': '1',
-        'author': 'robvanderleek',
-        'color': '#C00000',
-        'head': 'caffeine',
-        'tail': 'curled',
-        'version': '1.0'
-    }
-    res.end(JSON.stringify(response));
-}
-
-const handleWithBody = (req, res, handler) => {
-    let body = [];
-    req.on('data', (chunk) => {
-        body.push(chunk);
-    }).on('end', () => {
-        body = Buffer.concat(body).toString();
-        handler(req, res, JSON.parse(body));
-    });
-}
-
-const handleGameStart = (req, res, body) => {
-    console.log(`Game started: ${body.game.id}`);
-    res.writeHead(200);
-}
-
-const handleMove = (req, res, body) => {
-    const {turn, you: snake, board} = body;
-    console.log(`/move called for turn: ${turn}`);
-    const dir = getDirection(board, snake);
-    res.setHeader('Content-Type', 'application/json');
-    res.writeHead(200);
-    res.end(`{"move": "${dir}"}`);
-}
-
-const getDirection = (board, snake) => {
-    const directions = preferredDirections(board, snake.head)
-    return selectDirection(board, snake.head, directions)
-}
-
-const preferredDirections = (board, head) => {
-    const food = nearestFood(head, board.food);
-    let result = []
-    if (head.y != food.y) {
-        result.push(head.y < food.y ? 'up' : 'down');
-    }
-    if (head.x != food.x) {
-        result.push(head.x < food.x ? 'right' : 'left');
-    }
-    return result.concat(['left', 'up', 'right', 'down']
-        .filter(d => !result.includes(d)));
-}
-
-const nearestFood = (head, food) => food.sort((f1, f2) => distance(head, f1) - distance(head, f2))[0]
-
-const distance = (p1, p2) => Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));
-
-const selectDirection = (board, head, directions) => {
-    for (const d of directions) {
-        if (d === 'left' && freeCell(board, {x: head.x - 1, y: head.y})) {
-            return 'left'
-        } else if (d === 'right' && 
-                freeCell(board, {x: head.x + 1, y: head.y})) {
-            return 'right'
-        } else if (d === 'down' && 
-                freeCell(board, {x: head.x, y: head.y - 1})) {
-            return 'down'
-        } else if (d === 'up' && freeCell(board, {x: head.x, y: head.y + 1})) {
-            return 'up'
-        }
-    }
-    console.log('Oops');
-}
-
-const freeCell = (board, c) => {
-    if (board.snakes.flatMap(s => s.body).some(p => equal(c, p))) {
-        return false;
-    }
-    return c.x >= 0 && c.y >= 0 && c.x < board.width && c.y < board.height;
-}
-
-const equal = (p1, p2) => p1.x === p2.x && p1.y === p2.y;
-
-const PORT = process.env.PORT || 3000;
-const server = http.createServer(requestHandler);
-server.listen(PORT, '0.0.0.0', () => console.log(`Battlesnake server running on port: ${PORT}`));
+console.log('Hello, world!');